An ablation test fixture for a motor-unlocked launching device

Abstract

This invention provides a motor-unlocked launch device ablation test fixture, comprising: a base plate (1), a front main arm (2), a worktable (3), an electric push rod (4), a mechanical safety device (5), a guide groove (6), a mounting base (7), an auxiliary arm (8), and a rear main arm (9). The launch device is mounted on the worktable, and a movable push arm is installed on the lower part of the worktable, allowing the launch device to move with the worktable during the test, moving away from the engine exhaust flame, simulating the relative positional relationship between the launch device and the engine during the launch beam separation process. By controlling the locking and movement of the push arm through the electric push rod and the mechanical safety device, the ablation time of the launch device can be accurately controlled according to the command, simulating the ablation conditions during the actual engine launch process.

Description

Technical Field

[0001] This invention belongs to the technical field of launch device test fixture design, specifically relating to a launch device ablation test fixture for motor unlocking. Background Technology

[0002] During launch, rail-mounted launchers are subject to ablation of their surface due to the exhaust gas flow from the engine. The protective layer on structural components is easily melted by the exhaust gas and subsequently washed away by the high-speed airflow. To prevent damage from the engine exhaust gas, existing rail-mounted launchers, both domestically and internationally, employ protective measures such as anti-burn coatings and paints on their surfaces.

[0003] To verify the ablation resistance of surface coatings and paints on the launch device and reduce verification costs, ablation tests are typically conducted on the launch device simultaneously with ground engine test runs. However, because engine test runs are lengthy, while in actual launch conditions the launch device is subjected to exhaust plume ablation for an extremely short time, and different parts of the launch device experience varying degrees of ablation, simply subjecting the launch device to static ablation cannot simulate real-world operating conditions and could easily lead to over-testing and damage to the launch device. Therefore, to simulate real-world launch conditions and address these issues, designing an ablation test fixture capable of moving the launch device is essential.

[0004] No reports have been found regarding the ablation test fixture for the launch device. Summary of the Invention

[0005] The technical problem this invention aims to solve is to provide a launch device ablation test fixture for motor unlocking, simulating the ablation of the launch device during actual launch caused by engine ignition, and conducting test evaluations of the launch device. This addresses the issues of over-testing caused by the test piece being ablated by the engine exhaust flame while stationary during engine ignition, and the limited number of tests and insufficient evaluation of the launch device during actual launches.

[0006] This invention provides an ablation test fixture for a motor-unlocked launching device, comprising: a base plate 1, a front main arm 2, a worktable 3, an electric push rod 4, a mechanical safety device 5, a guide groove 6, a mounting base 7, an auxiliary arm 8, and a rear main arm 9, wherein: The base plate 1 is mounted on the engine test bench via the mounting base 7. The work platform 3 is connected above the base plate 1 via the front main arm 2 and the rear main arm 9, which are arranged in a staggered manner. When the front main arm 2 and the rear main arm 9 rotate, the work platform 3 rises above the base plate 1 or falls in front of / behind the base plate 1. The launch device for ablation testing is placed on the work platform 3. The base plate 1 is provided with a guide groove 6. The first end of the auxiliary arm 8 is connected to the middle of the rear main arm 9 / front main arm 2, and the second end is slidably disposed in the guide groove 6. When the second end of the auxiliary arm 8 slides, it drives the rear main arm 9 / front main arm 2 to rotate. The electric push rod 4 is fixedly mounted on the base plate 1, and the movable end is connected to the mechanical safety 5. When the mechanical safety 5 is inserted into the guide groove 6, it is used to limit the second end of the auxiliary arm 8 to a preset position in the guide groove 6.

[0007] Optionally, the second end of the auxiliary arm 8 is equipped with a roller that moves along the guide groove 6.

[0008] Optionally, the base plate 1 is a rectangular plate, and threaded holes and shaft holes are arranged on the base plate 1; The electric push rod 4 and the guide groove 6 are fixed to the base plate 1 by screws; The lower ends of the front main boom 2 and the rear main boom 9 are connected to the base plate 1 by pins and flanges; Mounting bracket 7 is mounted on base plate 1 by nuts.

[0009] Optionally, there is a rectangular groove between the front main arm 2 and the rear main arm 9, and shaft holes at both the upper and lower ends. The lower shaft hole is used to connect with the base plate 1, and the upper shaft hole is used to connect with the worktable 3. A shaft hole is provided in the middle of the rear main boom 9 / front main boom 2. The auxiliary boom 8 is connected to the first end of the shaft hole in the middle of the rear main boom 9 / front main boom 2 by a pin, which drives the movement of the front main boom 2 and the rear main boom 9.

[0010] Optionally, the worktable 3 is a rectangular plate with threaded holes at both ends; The lower end of the worktable 3 is fitted with a flange by screws, and the worktable 3 is installed on the upper end of the front main arm 2 and the rear main arm 9 through the flange.

[0011] Optionally, the two flanges are located diagonally below the worktable 3.

[0012] Optionally, the electric actuator 4 is a actuator driven by a motor. The movable end of the front end of the electric actuator 4 is provided with a shaft hole, and one end of the mechanical safety 5 is connected to the movable end of the front end of the electric actuator 4 by bolts.

[0013] Optionally, the guide groove 6 is a U-shaped channel arranged perpendicular to the direction of the electric push rod 4. The guide groove 6 has a rectangular hole on its side for inserting the mechanical safety 5; the height of the worktable 3 can be adjusted by adjusting the position of the rectangular hole and the electric push rod 4 on the base plate 1.

[0014] Optionally, the mechanical safety 5 is a rectangular metal block with a shaft hole at one end, which is bolted to the electric push rod 4, and the other end is inserted into the rectangular hole of the guide groove 6. By extending and retracting the electric push rod 4, the mechanical safety 5 can be inserted into or removed from the guide groove 6, which can limit or release the second end of the auxiliary arm 8.

[0015] This invention provides a motor-unlocked ablation test fixture for a launching device. The launching device is mounted on a workbench, and a movable push arm is installed under the workbench, allowing the launching device to move with the workbench during the test, moving away from the engine exhaust flame, simulating the relative positional relationship between the launching device and the engine during launch separation. The locking and movement of the push arm are controlled by an electric push rod and a mechanical safety device, allowing precise control of the ablation time of the launching device according to commands, simulating the ablation conditions during a real engine launch. In the initial state, the electric push rod 4 remains extended, and the auxiliary arm 8 is fixed by the mechanical safety device 5 to prevent movement of the workbench 3, ensuring the launching device receives exhaust flame ablation. After a predetermined time, the electric push rod 4 retracts, releasing the constraint on the auxiliary arm 8. Under the action of the exhaust flame thrust, the fixture, and the weight of the launching device, the auxiliary arm 8 slides along the guide groove 6, allowing the launching device to leave the ablation area of ​​the engine exhaust flame. This invention uses a planar linkage mechanism to achieve the ablation test assessment of the launching device and an electric push rod to unlock the mechanism. At the start of the test, the fixture is held in an elevated position by the self-locking force of the electric push rod, allowing the launching device to be ablated by the engine's exhaust plume. After the predetermined ablation time is reached, the electric push rod receives a command to retract, and the fixture and launching device rapidly fall under the thrust of the exhaust plume and their own weight. The descent of the worktable in this invention is not limited by the drive mechanism of ordinary lifting platforms, ensuring a safe descent speed. During the descent, the geometric design of the front and rear main arms ensures that the worktable and launching device maintain a horizontal posture as they fall forward / backward and away from the engine's exhaust plume. This simulates the relative positional relationship between the launching device and the engine during launch from the beam, more closely resembling the ablation conditions experienced by the launching device in real-world conditions. Moreover, the descent height is greater than that of ordinary X-type lifting platforms. This invention is flexible in use, simple to operate, highly versatile, and has low requirements for the test site, making it suitable for ablation tests on various types of guide rail launching devices. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an ablation test fixture for a motor unlocking transmitter provided by the present invention; Figure 2 This is a schematic diagram showing the positional relationship between the auxiliary arm 8, the mechanical safety 5, and the electric push rod 4 in this invention; Figure 3 This is a schematic diagram of the initial state of an ablation test fixture for a motor unlocking transmitter provided by the present invention. Figure 4 This is a schematic diagram of the falling state of an ablation test fixture for a motor unlocking transmitter provided by the invention; Explanation of reference numerals in the attached figures: 1-Base plate, 2-Front main boom, 3-Workbench, 4-Electric push rod, 5-Mechanical safety device, 6-Guide groove, 7-Mounting base, 8-Auxiliary boom, 9-Rear main boom, 8a-Roller. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0020] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the invention, and should not be construed as limiting the invention. Furthermore, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0022] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0024] Please see Figure 1 The present invention provides a test fixture for the ablation of a motor-unlocked launching device, comprising a base plate 1, a front main arm 2, a worktable 3, an electric push rod 4, a mechanical safety device 5, a guide groove 6, a mounting base 7, an auxiliary arm 8, and a rear main arm 9.

[0025] The base plate 1 is a hollow rectangular plate. The lower flange of the front main arm 2, the electric push rod 4, the guide groove 6, and the lower flange of the rear main arm 9 are installed on the threaded holes of the base plate 1 using screws. Five sets of mounting seats 7 are used to fix the base plate 1 to the test platform using bolts and nuts. The worktable 3 is a rectangular plate. The upper flange of the front main arm 2, the upper flange of the rear main arm 9, and the launching device are installed on the threaded holes of the worktable 3 using screws. The rear main arm 9 has a through rectangular groove in the middle. The upper end of the auxiliary arm 8 extends into the rectangular groove, and the upper end of the auxiliary arm 8 is connected to the shaft hole in the middle of the rear main arm 9 by a pin.

[0026] Please see Figure 2 The auxiliary arm 8 rolls within the guide groove 6 via bottom rollers 8a, effectively reducing the friction between the auxiliary arm 8 and the guide groove 6. The guide groove 6 is a hollow cuboid channel with through rectangular grooves arranged on both sides.

[0027] Please see Figure 3 In the initial state of the tooling, one end of the mechanical safety 5 extends into the rectangular groove of the guide groove 6 to limit the roller 8a, and the other end is connected to the electric push rod 4 by a screw. The electric push rod 4 remains in the extended state, so that the tooling is maintained in the initial state.

[0028] Please see Figure 4 The electric push rod 4 retracts and pulls out the mechanical safety 5 from the rectangular groove on the side of the guide groove 6, releasing the limit on 8a. Under the action of the tail flame thrust and its own weight, the tooling and launching device drive the auxiliary arm 8 to move along the hollow channel of the guide groove 6, driving the front main arm 2 and the rear main arm 9 to rotate, thereby causing the worktable 3 and the launching device to fall forward.

[0029] The working principle of this invention is as follows: Before the test, the base is fixed to the test bench using screws and nuts on five sets of mounting bases, and the launching device is installed on the workbench. In the initial test state, the self-locking force of the electric push rod keeps the mechanical safety inserted into the guide groove, limiting the roller at the bottom of the auxiliary arm and fixing it. Utilizing the connection between the auxiliary arm and the rear main arm, the workbench and launching device are kept in a raised state to receive the ablation from the engine exhaust flame. After the predetermined ablation time is reached, the electric push rod receives a command to retract, pulling out the mechanical safety. The auxiliary arm moves along the guide groove, causing the front and rear main arms to rotate along the bottom shaft holes. Using the geometric relationship between the front and rear main arms, the workbench and launching device are kept horizontal and lowered forward, away from the engine exhaust flame, completing the ablation test of the launching device.

[0030] In summary, this invention pertains to the design technology of test fixtures for launch devices. It includes a base plate 1, a front main arm 2, a worktable 3, an electric push rod 4, a mechanical safety device 5, a guide groove 6, a mounting base 7, an auxiliary arm 8, and a rear main arm 9. At the start of the test, the self-locking force of the electric push rod keeps the fixture in an elevated state, allowing the launch device to be ablated by the engine's exhaust plume. After a predetermined ablation time, the electric push rod receives a command to retract, and the fixture and launch device rapidly fall under the thrust of the exhaust plume and their own weight. During the fall, the geometric design of the front and rear main arms ensures that the worktable and launch device remain horizontal as they fall forward and away from the engine's exhaust plume, simultaneously simulating the relative positional relationship between the launch device and the engine during launch, more closely approximating the ablation conditions experienced by the launch device under real-world conditions. This invention is flexible in its use, simple to operate, highly versatile, and has low requirements for the test site, making it suitable for ablation tests of various types of rail-guided launch devices.

[0031] The above detailed embodiments are a description of the present invention. It should not be considered that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, several simple deductions and substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the protection scope of the present invention.

Claims

1. An electric machine unlocked launch device ablation test fixture, characterized by, include: The components include: base plate (1), front main boom (2), worktable (3), electric push rod (4), mechanical safety (5), guide groove (6), mounting base (7), auxiliary boom (8), and rear main boom (9), among which: The base plate (1) is mounted on the engine test stand via the mounting base (7). The worktable (3) is connected above the base plate (1) via the front main arm (2) and the rear main arm (9) arranged in a staggered manner. When the front main arm (2) and the rear main arm (9) rotate, the worktable (3) rises above the base plate (1) or falls in front of / behind the base plate (1). The worktable (3) is used to place the launching device for the ablation test. A guide groove (6) is provided on the base plate (1). The first end of the auxiliary arm (8) is connected to the middle of the rear main arm (9) / front main arm (2), and the second end is slidably set in the guide groove (6). When the second end of the auxiliary arm (8) slides, it drives the rear main arm (9) / front main arm (2) to rotate. The electric push rod (4) is fixedly mounted on the base plate (1), and the movable end is connected to the mechanical safety (5). When the mechanical safety (5) is inserted into the guide groove (6), the second end of the auxiliary arm (8) is limited to a preset position in the guide groove (6).

2. The motor-unlocked launch device ablation test fixture of claim 1, wherein, The second end of the auxiliary arm (8) is equipped with a roller, which moves along the guide groove (6).

3. The motor-unlocked launch device ablation test fixture of claim 1, wherein, The base plate (1) is a rectangular plate, and threaded holes and shaft holes are arranged on the base plate (1); The electric push rod (4) and the guide groove (6) are fixed to the base plate (1) by screws; The lower ends of the front main boom (2) and the rear main boom (9) are connected to the base plate (1) by pins and flanges; The mounting base (7) is mounted on the base plate (1) by a nut.

4. The motor-unlocked launch device ablation test fixture of claim 1, wherein, There is a rectangular groove between the front main arm (2) and the rear main arm (9), and there are shaft holes at both the upper and lower ends. The lower shaft hole is used to connect with the base plate (1), and the upper shaft hole is used to connect with the worktable (3). A shaft hole is provided in the middle of the rear main arm (9) / front main arm (2). The auxiliary arm (8) is connected to the shaft hole in the middle of the rear main arm (9) / front main arm (2) by a pin, which drives the movement of the front main arm (2) and the rear main arm (9).

5. The motor-unlocked launch device ablation test fixture of claim 1, wherein, The workbench (3) is a rectangular plate with threaded holes at both ends; The lower end of the workbench (3) is fitted with a flange by screws, and the workbench (3) is installed on the upper end of the front main arm (2) and the rear main arm (9) by means of the flange.

6. The motor-unlocked launch device ablation test fixture of claim 5, wherein, Two flanges are located diagonally below the workbench (3).

7. The ablation test fixture for the motor unlocking launching device according to claim 1, characterized in that, The electric push rod (4) is a push rod driven by a motor. The movable end of the electric push rod (4) is provided with a shaft hole, and one end of the mechanical safety (5) is connected to the movable end of the electric push rod (4) by bolts.

8. The ablation test fixture for the motor unlocking launching device according to claim 1, characterized in that, The guide groove (6) is a U-shaped channel, arranged perpendicular to the direction of the electric push rod (4). The guide groove (6) has a rectangular hole on its side for inserting the mechanical safety (5); the height of the worktable (3) can be adjusted by adjusting the position of the rectangular hole and the electric push rod (4) on the base plate (1).

9. The ablation test fixture for the motor unlocking launching device according to claim 8, characterized in that, The mechanical safety (5) is a rectangular metal block with a shaft hole at one end, which is connected to the electric push rod (4) by bolts, and the other end is inserted into the rectangular hole of the guide groove (6); By extending and retracting the electric push rod (4), the mechanical safety (5) can be inserted into or removed from the guide groove (6), and the second end of the auxiliary arm (8) can be limited or released.

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